title: Dimers linked by type-I C-F···F-C contacts in (Z)-3-methyl-4-[2-(4-methylphenyl)hydrazinylidene]-1-(pentafluorophenyl)-1H-pyrazol-5(4H)-one.
abstract: The title compound, C17H11F5N4O, is described and compared with two closely related analogues in the literature. There are two independent molecules in the asymmetric unit, linked by N-H···O hydrogen bonds and π-π interactions into dimeric entities, presenting a noticeable noncrystallographic C2 symmetry. These dimers are in turn linked by a medium-strength type-I C-F···F-C interaction into elongated tetramers. Much weaker C-H···F contacts link the tetramers into broad two-dimensional substructures parallel to (101).
authors.affiliation: Departamento de Ciencias Físicas, Universidad Andrés Bello, República 220, Santiago de Chile, Chile.
authors.forename: Luis
authors.initials: L
authors.lastname: Alvarez-Thon
authors.forename: Carlos
authors.initials: C
authors.lastname: Bustos
authors.forename: Katherina
authors.initials: K
authors.lastname: Espinoza-Santibañez
authors.forename: Maria Teresa
authors.initials: MT
authors.lastname: Garland
authors.forename: Ricardo
authors.initials: R
authors.lastname: Baggio
mesh_terms: D018360:Crystallography, X-Ray; D006834:Hydrazines / Q000737:chemistry*; D006860:Hydrogen Bonding; D015394:Molecular Structure; D047069:Pyrazolones / Q000737:chemistry*; D005464:Fluorobenzenes; D005466:Fluorocarbons
chemical_list: D006834:Hydrazines; D047069:Pyrazolones; C587112:(Z)-3-methyl-4-(2-(4-methylphenyl)hydrazinylidene)-1-(pentafluorophenyl)-1H-pyrazol-5(4H)-one; D005464:Fluorobenzenes; D005466:Fluorocarbons
keywords: crystal structure; noncrystallographic symmetry; pyrazole derivatives; type-I C—F...F—C contacts